How to grow elkhorn fern
Overview
Elkhorn fern (Platycerium bifurcatum) is an epiphytic clumping fern from the Polypodiaceae family, grown for its distinctive antler-like fronds. It thrives in filtered light on trees or shaded walls and is a popular choice for adding texture to gardens and indoor spaces.
Soil Preparation
Elkhorn fern does not require soil; it is an epiphyte. Mount it on a board or in a basket with sphagnum moss, bark, or a coarse orchid mix. Ensure the mount drains freely and does not hold water against the roots.
Growing Guide
Position elkhorn fern in bright, filtered light with protection from harsh afternoon sun. Mount it on a board, tree trunk, or grow in a basket with sphagnum moss or bark; do not bury the crown. Space plants 30–50 cm apart on the mount. Water when the mount feels dry, but avoid letting the root zone stay soggy. In cooler districts, wait until after the last frost to place outdoors or provide frost protection.
Care
Feed monthly during active growth (spring to autumn) with a balanced liquid fertiliser diluted to half strength. Prune only to remove dead or damaged fronds. Mist regularly in dry spells to maintain humidity, especially if grown indoors.
Companion Planting
Elkhorn fern pairs well with staghorn fern, birds nest fern, and other epiphytic ferns on the same mount or tree. Avoid planting near heavy feeders like citrus or in dense groundcovers that may trap moisture around the crown.
Common Pests & Risks
Scale and mealybug can infest elkhorn fern, especially on the undersides of fronds. Treat with a horticultural oil or neem oil spray, and wipe off visible pests with a damp cloth. Avoid overwatering to reduce the risk of fungal issues.
Troubleshooting
Brown frond tips: usually from low humidity or dry air; mist more often. Yellowing fronds: often from overwatering or poor drainage; let the mount dry out between waterings. Black spots: may be a fungal infection; improve air circulation and avoid wetting the fronds. Slow growth: check for insufficient light or lack of feeding. Pests: scale and mealybug; treat with neem oil or remove manually.